SEO is still new in Hong Kong market, but it is very common in US and worldwide.
Your industry could easily become NO. 1 in a search engines (Google / Yahoo etc) if many companies in the same industry have not start a SEO for their eshop.

First of all we have to understand the "Search" function to a search engines site (Google / Yahoo etc) is to help users find exact information, if your content is rare or has not increased, the data will become outdated, and the proportion of relevant information will become less and less, your ranking will be down.

To maintain the position, must be either updated and increased content segment, and adding more access links (such as frequent participation in various forums related to the discussions), these are the work takes time, money, not "free". If you want to share in the search term forefront, we must understand the SEO does not do "one time" only, but a long-term process rather than paragraph.

The SEM, SEO is not 100% predicable, making this work appear to be more mysterious, and some companies simply sell its profits as a cheat. Personally think that is not the case, SEM IT technology required is very low (unless you want to use improper means), some of communication and the market is simply learned, for example, you write an essay how to write is (search) impression of a deeper (more rows of articles you before) (in SEO terms, that is, keyword proximity, frequency and density)?

General commerce website in Hong Kong, the biggest problem is too little text, so often look up some words, the row in front of all the site forums or articles non-profit organizations, especially in some news-related terms. So the person in charge wants to do good SEO, first of all what we do not want that around your industry keywords as possible to write more articles, Content is King, or SEO no way to start.